/Engine/Source/Runtime/Renderer/Public/InstanceCulling/InstanceCullingContext.h
void SetupDrawCommands ( FMeshCommandOneFrameArray & VisibleMeshDrawCommandsInOut, bool bCompactIdenticalCommands, int32 & MaxInstancesOut, int32 & VisibleMeshDrawCommandsNumOut, int32 & NewPassVisibleMeshDrawCommandsNumOut )